Kieran Mitchell-Jones

Senior Software Engineer @ Vitesse | .NET, AKS, Azure

Greater Cardiff Area

About

As a Senior Software Engineer at Vitesse, I work with a team of engineers to design and deliver scalable fintech solutions that enable high-value global payments. I utilise the .NET platform to build reliable services, improve performance, and develop features suited to a fast-paced environment. I have over 8 years of professional experience in software engineering, having previously worked at ASOS, where I delivered e-commerce systems supporting millions of customers. I graduated with a First Class Honours Bachelor’s degree in Computer Science from Cardiff University, gaining a strong foundation in programming, data structures, algorithms, and software design. I’m passionate about learning new technologies, solving real-world problems, and collaborating with other engineers to build high-quality software.

Experience

  • Senior Software Engineer at Vitesse
    Jan 2026 - Present · 6 mos

    • Led migration of SWIFT payment processing to a new banking provider, delivering significant monthly cost savings • Engineered new payment capability enabling US cross-border payments via SWIFT • Drove integration with a new banking partner, establishing a backup payment rail for US clients • Promoted AI adoption across the business as part of the AI Champions initiative

  • ASOS.com (Full-time · 3 yrs 5 mos)
    • Senior Software Engineer
      Aug 2024 - Jan 2026 · 1 yr 6 mos

      • Led, planned, and rolled out new technologies within the team. This includes the migration to Azure SQL Hyperscale, ensuring scalability and performance improvements. This involved assessing architectural changes, coordinating with stakeholders, and managing the rollout to minimise disruption. • Championed best practices and adherence to ASOS standards as the Fundamentals Champion within the team. This involved leading meetings, planning PBIs and feeding back to external stakeholders. • Conducted investigations into outages and inefficiencies within our code and infrastructure to ensure a stable and efficient suite of applications. • Mentored new engineers; providing guidance and support alongside helping them understand the team’s practices and projects.

    • Software Engineer
      Sep 2022 - Aug 2024 · 2 yrs

      • Collaborated with a small team to migrate monolithic solutions into scalable microservices with AKS • Provided support and planning for large scale events crucial to ASOS’ business goals such as Black Friday where requirements include our team’s API supporting hundreds of requests per second. • Pushed for existing solutions to be rewritten in to a more maintainable, developer friendly codebase to improve our team’s efficiency.

  • Software Engineer at Wealthify
    Mar 2019 - Sep 2022 · 3 yrs 7 mos

    • Played a key role in the migration of a monolithic .NET Framework solution to a microservices architecture using .NET Core. • Collaborated with cross-functional teams to implement full stack solutions with .NET, HTML, JavaScript, and Flutter. • Developed and maintained scalable applications to enhance user experience and optimize performance using Azure based solutions such as AKS.

  • Method4 (Cardiff, United Kingdom)
    • Software Engineer
      Jul 2018 - Mar 2019 · 9 mos

      • Led workshops for clients on technologies such as .NET, SSRS, and SharePoint to enhance their understanding and usage. • Mentored newer graduate engineers within the company, providing guidance and support in their professional development • Pushed for engineers within my team to adhere to good practices such as TDD, SOLID, KISS etc.

    • Graduate Software Engineer
      Aug 2017 - Jul 2018 · 1 yr

      • Developed expertise in Microsoft .NET technologies as a Graduate Software Engineer at Method4 in Cardiff, UK. • Collaborated with team members to implement industry standards and best practices in software development. • Contributed to the successful delivery of projects to a variety of clients by leveraging skills in coding, testing, and debugging.